Drugs like cocaine and even marijuana and nicotine affect the brainâs natural function. The drug overwhelms the brain with a chemical called dopamine. Dopamine makes the brain and body feel pleasure. When the drug wears off, the dopamine drains out of the userâs system. This makes a person feel that the only way they can feel pleasure is by taking drugs.
March 31, 2015. Apple uses its own signature operating system, which since 2001 has been derived from Unix and known as OS X. Before OS X came OS 9, otherwise known as Classic.. As of June 2014, the latest version of OS X is called Mavericks..
A step-by-step guide to finding out what version of iOS, Apple's mobile operating system, is running on your iPhone or iPad. by | 25 Feb 15. There are several reasons why you might need to know what version of iOS, Apple's mobile operating system, your iPhone or iPad is running.